Watch this first: Narcissist First Discards You in His Mind, Then in Reality https://www.youtube.com/watch?v=Xqqje8KsL90
During the devaluation and discard phases, the narcissist's attempts to hand over to you the introject (snapshot) that represents you in his mind, imbuing it with negativity (devaluation). It never works owing to the narcissist's introject constancy (intended to allay his abandonment anxiety/separation insecurity) and to his repetition compulsion.